'The Case for Spirit Photography' is a book that argues in favor of spirit photography, proposing that the phenomena is indeed a marriage between the scientific and the spiritual world. It is a type of photography whose primary goal is to capture images of ghosts and other spiritual entities, especially in ghost hunting. Perhaps, notably, the author of this book is not known for his trust in such superstitions, for this individual is none other than the author of the Sherlock Holmes series, Arthur Conan Doyle.